Sökning: "small-scale trials"

Visar resultat 1 - 5 av 12 uppsatser innehållade orden small-scale trials.

  1. 1. Controlling nutrients in a hydroponic growing system

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Institutionen för reglerteknik

    Författare :Kalle Elmér; [2020]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Hydroponics is a method for cultivating plants with their roots suspended in water. This means that the nutrients normally present in the soil have to be supplied artificially, in an appropriate amount. Electrical conductivity can be used to measure the nutrient concentration in a hydroponic solution. LÄS MER

  2. 2. Prototype manufacturing of microwave components using plastic 3D printing

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Fasta tillståndets elektronik

    Författare :Björn Malmquist; [2019]
    Nyckelord :;

    Sammanfattning : The ability to easily customize and produce specialized MW-components for research and industry is a real challenge and the need is identified, as standardized parts have limited use and can limit design freedom. This study aims at exploring if there are simple ways to manufacture rectangular X-band waveguides with operating frequency of 8-12GHz with novel polymer additive manufacturing and chemical metal deposition that can match Computer Numerical Control (CNC) manufactured rectangular metal waveguides in performance. LÄS MER

  3. 3. Investigating discouraging and encouraging emic reasons to apply eco-efficient farming methods : a participatory study with indigenous small-scale farmers in Ratanakiri, Cambodia

    Master-uppsats, SLU/Department of Biosystems and Technology (from 130101)

    Författare :Lilian-Marleen Beck; [2018]
    Nyckelord :agroecology; transdisciplinary research; action research; participative video making; eco-efficiency; cosmology; emic perception; indigenous farmers; small-scale farmer; non adoption of innovations; Ratanakiri; Cambodia;

    Sammanfattning : In 2008 the most extensive evaluation of global agriculture in human history notable named “agriculture at a crossroad” was published, indicating that agroecological small-scale farming systems could be a path to follow in the future in order to secure a sustainable food supply. Yet it is claimed that there is a gap between knowledge regarding the methods used for agroecological farming and its application by farmers. LÄS MER

  4. 4. Spårämnestillsatsers påverkan på biogasproduktionen vid anaerob rötning av avloppsslam : Behovet av spårämnen vid slamrötning på Karlstads reningsverk

    Master-uppsats, Karlstads universitet/Institutionen för miljö- och livsvetenskaper (from 2013)

    Författare :Maaike Fokkema; [2018]
    Nyckelord :anaerobic digestion; biogas; sewage sludge; trace element addition; nickel; cobalt; iron; magnesium; EDTA; correlation analysis; pH; retention time; flow rate; mercury; lead; rötning; biogas; avloppsslam; spårämnestillsatser; nickel; kobolt; järn; magnesium; EDTA; korrelationsanalys; pH; uppehållstid; flöde; kvicksilver; bly;

    Sammanfattning : Sverige har som mål att endast använda fossilfria bränslen inom fordonsflottan till år 2030. Ett av dessa fossilfria bränslen är biogas som bland annat produceras på Karlstads reningsverk, Sjöstadsverket. Sjöstadsverket planerar att bygga ut sin slammottagningsstation för att kunna ta emot mer slam. LÄS MER

  5. 5. Determination of Thermal Conductivity of Wood Exposed to Fire based on Small Scale Laboratory Trials for Finite Element Calculations

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Byggkonstruktion och brand

    Författare :Johnny Chung; [2017]
    Nyckelord :Wood; Cone Calorimeter. Conductivity; Fire; Temperature; TASEF; Finite element method; Trä; Konkalorimeter; Konduktivitet; Brand; Temperatur; TASEF; Finita elementmetoden;

    Sammanfattning : This study describes an approach to determine the thermal conductivity of wood at elevated temperatures. The aim is to be able to use the developed conductivity as input in structural elements in finite element calculations. LÄS MER